UV/H2O2/草酸铁络合物光降解水中氯仿的研究

以４００Ｗ高压汞灯为紫外光源，Ｈ２Ｏ２－草酸铁络合物为光氧化剂，对氯仿水溶液进行了光降解反应实验研究．结果表明，ＵＶ／Ｈ２Ｏ２草酸铁络合物体系能有效地使水溶液中氧仿迅速光解脱氯；在等摩尔系列溶液中,Ｆｅ３＋／草酸根的摩尔比为１：３时，氯仿光解效果最好：溶液ｐＨ值对氯仿光解有显著影响，ｐＨ值在３－４时光解速率最快；随着Ｈ２ｏ２浓度的增加，氯仿大解速率提高，但Ｈ２Ｏ２浓度较大时，Ｈ２Ｏ２的有效利用率降低；温度对氯仿光解反应有一定影响，反应的表观活化能为７．６ｋＪ／ｍｏｌ.     

高效液相色谱法在无机分析中的应用

本文综述了高效液相色谱法在无机分析中的应用进展。分别介绍了正相、反相、离子对、离子交换、排阻和胶束流动相等液相色谱法在有机金属化合物、金属络合物、无机阳离子和阴离子分离及测定上的实际应用。     

雌二醇在铁(Ⅲ)-草酸盐配合物体系中的光降解

以125W高压汞灯为光源,研究了水中雌二醇(E2)在铁(Ⅲ)-草酸盐体系中的光降解;考查了初始pH值、铁(Ⅲ)/草酸盐配比、E2初始浓度对E2光降解的影响.结果表明,铁(Ⅲ)/草酸盐体系能引发E2光降解.在pH=3·50,Fe(Ⅲ)/草酸盐配比为10·0/120·0μmol·l-1时,2mg·l-1E2光照160min可降解48·0%.在pH3·0—6·0范围内,pH值为3·0—4·0时E2降解率较高;在2·0—10·0mg·l-1范围内,光降解效率随水溶液中E2初始浓度的增加而降低.     

过氧化氢/草酸铁体系太阳光催化降解染料废水的研究

以过氧化氢 /草酸铁络合物作光氧化剂 ,利用太阳光对 10种水溶性染料模拟废水进行了光氧化降解试验研究 ,发现在日光照射下 ,过氧化氢 /草酸铁络合物能使染料溶液迅速降解。以活性艳蓝KN R为代表 ,研究各种因素对光降解的影响。结果表明 ,溶液pH为 2 0～ 4 0时 ,光降解速率快 ;溶液中Fe3 + 与草酸根的摩尔比为 1∶3时 ,光解效果最好 ;提高H2 O2 浓度可以提高光降解速率 ,但H2 O2 的利用率会降低。     

UV-vis/草酸铁络合物/H2O2法处理垃圾渗滤液的研究

在紫外光照下,利用H2O2和草酸铁络合物对垃圾渗滤液进行了处理,探讨了紫外光照时间、pH值、fenton试剂、草酸铵对垃圾渗滤液中CODCr去除率的影响.结果表明:UV-vis/草酸铁络合物/H2O2法对垃圾渗滤液CODCr去除率有较好的效果,当操作条件是:pH取3,反应时间为1 h,H2O2投加量为1.4 mL,H2O2/FeSO4·7H2O投加比(摩尔比)为5∶1,草酸铵投加量为5.5 mL时,CODCr的去除率达到了78.8%.     

The environmental state at sea

Seas and oceans are confronted with a plethora of environmental problems, caused by land-based activities (agriculture, industries, and ports) and by maritime activities (such as shipping, fishing, oil and gas drilling, tourism, and navigational dredging). Environmental problems at sea challenge the efficacy of state sovereignty. Who is responsible, accountable, and regulates environmental and spatial problems at the level of regional seas, and what is the role of states in these processes of governance? In the regional seas and on the high seas, the environmental state is challenged by two developments: states become players at different levels, and states are confronted with the activities of big market players where they have no or little jurisdiction. The different forms of the environmental state in Europe’s regional seas and in the Arctic Ocean are examined.     

密度泛函理论方法研究铝-麦芽酚配合物的形态结构与水交换反应

在B3LYP/6-311+G(d,p)基组水平下采用密度泛函理论方法系统开展了以下工作:(1)优化得到1∶1、1∶2和1∶3铝-麦芽酚配合物10种可能构型的静态结构、NPA电荷以及能量参数,计算得到Al(ma)3配合物4种异构体的核磁共振、紫外和红外等光谱学数据并与文献实验值比较,证明本文采用的计算方法和模型适用于铝-麦芽酚体系的研究;(2)模拟1∶1和1∶2铝-麦芽酚配合物9种可能位点的水交换反应,其中3个位点计算得到的水交换反应速率对数log kex(s-1)分别为2.4(Al(ma)(H2O)2+4(cis to ma))、2.6(cis-Al(ma)2(H2O)+2(I))和3.0(trans-Al(ma)2(H2O)+2(I)),与实验值2.5(Al(ma)2+)和3.3(Al(ma)+2)相符,说明相应位点为反应活性位点;(3)探讨铝-麦芽酚配合物毒性与其形态结构之间的相关机制。     

Effect of Fe-chelating complexes on a novel M2FC performance with ferric chloride and ferricyanide catholytes

As an effort to better utilize the microbial fuel cell (MFC) technology, we previously proposed an innovative MFC system named M2FC consisting of ferric-based MFC part and ferrous-based fuel cell (FC) part. In this reactor, ferric ion, the catholyte in the MFC part, was efficiently regenerated by the FC part with the generation of additional electricity. When both units were operated separately, the ferric-based MFC part produced approximately 1360 mW m⁻² of power density with FeCl₃ as catholyte and Fe-citrate as anolyte. The ferrous-based FC part with FeCl₃ as catholyte and Fe-EDTA as anolyte displayed the highest power density (1500 mW m⁻²), while that with ferricyanide as catholyte and Fe-noligand as anolyte had the lowest power density (380 mW m⁻²). The types of catholytes and chelating complexes as anolyte were found to play important roles in the reduction of ferric ions and oxidation of ferrous ion. Linear sweep voltammetry results supported that the cathode electrolytes were electrically active and these agreed well with the M2FC reactor performance. These results clearly showed that ligands played critical role in the efficiency and rate for recycling iron ion and thus the M2FC performance.     

稀土水杨醛Salphen希夫碱配合物的合成与表征

利用N，N’-双（水杨醛）缩邻苯二胺配体（L）与稀土金属离子合成了稀土水杨醛Salphen希夫碱配合物{[M（NO3）2]·2H2O；M=La，Nd，Sm}，并利用红外光谱（IR）、紫外-可见光谱（UV）、元素分析、摩尔电导率和差热热重（TG—DTA）对配合物的结构做了表征。结果表明，配合物中稀土金属离子M（Ⅲ）的配位数为6，同时还有2个NO3-和配位中心配位。     

二(2-乙基己基)磷酸(D2EHPA)萃取Fe3+的萃合物结构

以分离制革污泥淋滤液中Fe3+和Cr3+为背景,研究了二(2-乙基己基)磷酸(D2EHPA)分别从氯化物和硫酸盐介质中萃取Fe3+的效率,并应用配位化学理论结合MINTEQ程序,推测了可能的萃合物结构,讨论了D2EHPA浓度、溶液pH、溶液中阴离子对萃合物结构的影响.结果表明,在低Cl-浓度介质中,萃合物结构为FeA3...